Ethylene Glycol and Propylene Glycol-based Heat Transfer Fluid segmentation reveals that the EG segment is primarily driven by its superior thermal conductivity and low cost, which sustain demand across five core applications. In the HVAC arena, EG fluids enable efficient heat exchange in chillers and boilers, accounting for roughly 30 % of total usage. Industrial process cooling leverages EG’s high boiling point to protect equipment in petrochemical, metal‑working, and power‑generation plants, contributing about 25 % of the market. Refrigeration systems, especially in large‑scale cold‑storage facilities, rely on EG for its freeze‑resistance, representing 20 % of demand. Automotive cooling systems, where EG’s anti‑corrosion additives are critical, generate 15 % of sales. Finally, solar‑thermal collectors employ EG for its stability under prolonged solar exposure, comprising the remaining 10 %. Within each application, EG is further differentiated by type: conventional EG, extended‑life EG with antioxidant packages, low‑toxicity EG formulations for sensitive environments, and biodegradable EG designed for environmentally regulated sites. These sub‑types refine pricing tiers and adoption rates, collectively shaping the overall EG‑based fluid market size.